Module crypto

Defines runtime-supported cryptographic functions. What cryptgraphic functions have in common is that the operations they implement are: 1. Relatively expensive, and 2. Relatively common in Contract applications. In order to reduce gas costs, these functions are implemented in native (not-WASM) code that lives outside of the WASM runtime, and exposed to calls through the handles defined in this module.

Functions

keccak256

Computes the Keccak256 digest (32 bytes) of arbitrary input.

ripemd

Computes the RIPEMD160 digest (20 bytes) of arbitrary input.

sha256

Computes the SHA256 digest (32 bytes) of arbitrary input.

verify_ed25519_signature

Returns whether an Ed25519 signature was produced by a specified by a specified address over some specified message. Contract call fails if the input address or signature is not valid.